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0.1-ounce dosage 40 percent 60 minutes acetone solutions Aphis gossypii appeared approximately atomizer apparatus atomizer fumigation atomizer method C=center cent centrations chemical results Chrysanthemum commercial product conditions table cubic feet damp conditions damp fumigation damp or wet Dosage of nico Dosage of nicotine dry and damp dry and moist dry conditions effective efficiency exhaust method five fumigations four fumigations fumigated with 0.1 FUMIGATION MINUTES fumigation test gas concentrations gave good distribution greenhouse under dry high kill Insecticidal action insecticidal results less resistant lettuce little nicotine remained lower Lycopersicon esculentum Macrosi Macrosiphum solanifolii method gave methods of vaporization moist conditions Myzus persicae nicotine fumigation nicotine papers nicotine per 1,000 ounce dosage Overnight exposures percent kill percent of nicotine persicae on turnip phum plants pressure pressure-can relative humidity S=south shown in table smudge method Temperature tion tobacco smudge turnip average various dosages various methods water solutions wet conditions